A Bigger Cloud 9? New HI Observations of the RELHIC Candidate M94-Cloud 9

We present new HI observations of the REionization-Limited HI Cloud (RELHIC)candidate, M94-CL9, detected around M94 by Zhou et al. using theFive-hundred-meter Aperture Spherical Telescope (FAST). M94-CL9's HI propertiesas detected by FAST are consistent with a RELHIC as noted by Benitez-Llambay Navarro. Our observations with the Robert C. Byrd Green Bank Telescope (GBT)detect greater HI emission in M94-CL9 and result in HI properties that arelarger (corrected velocity width, W_50,c,t=35.7±0.6 km s^-1;and integrated flux,∫Sdv=0.28±0.04 Jy·km s^-1) than thosefound by Zhou et al. but that match those from the FAST All-Sky HI (FASHI)survey. These larger properties do not preclude M94-CL9 from being a RELHIC,but the wider spectral extent and spectral asymmetry reported here may be intension with predictions of RELHIC properties.